from info import redis_store, constants
from info.models import User, News, Category
from info.utils.response_code import RET
from info.utils.common import user_login_data
from . import index_blu
from flask import render_template, current_app, session, request, jsonify, g


# 功能描述:首页新闻列表展示
# 请求路径: /newslist
# 请求方式: GET
# 请求参数: cid,page,per_page
# 返回值: data数据
@index_blu.route('/newslist')
def news_list():
    """
    思路分析:
    1.获取参数
    2.校验参数,参数类型转换
    3.分页查询,用到paginate
    4.获取到分页对象属性,总页数,当前页,当前页对象
    5.将新闻对象列表,转成字典列表
    6.返回响应,携带数据
    :return:
    """
    # 1.获取参数
    cid = request.args.get('cid', '1')
    page = request.args.get('page',1) #获取不到默认值是1
    per_page = request.args.get('per_page',10)#获取不到默认值是10

    # 2.校验参数,参数类型转换
    try:
        page = int(page)
        per_page = int(per_page)
    except Exception as e:
        current_app.logger.error(e)
        page = 1
        per_page = 10

    # 3.分页查询,用到paginate
    try:
        #判断分类编号是否不等于1
        filters = [News.status == 0]
        # filters = []
        if cid != "1":
            filters.append(News.category_id == cid)

        paginate = News.query.filter(*filters).order_by(News.create_time.desc()).paginate(page,per_page,False)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR,errmsg="获取新闻失败")

    # 4.获取到分页对象属性,总页数,当前页,当前页对象
    totalPages = paginate.pages
    currentPage = paginate.page
    items = paginate.items

    # 5.将新闻对象列表,转成字典列表
    newsList = []
    for news in items:
        newsList.append(news.to_dict())

    # 6.返回响应,携带数据
    return jsonify(errno=RET.OK,errmsg="查询成功",newsList=newsList,totalPage=totalPages,currentPage=currentPage)

#首页内容
@index_blu.route('/',methods=['GET','POST'])
@user_login_data
def show_index_page():

    # 显示首页
    # 获取session中的用户信息
    # user_id = session.get("user_id", None)
    #
    # # 获取用户对象
    # user = None
    # if user_id:
    #     try:
    #         user = User.query.get(user_id)
    #     except Exception as e:
    #         current_app.logger.error(e)

    # 右侧的新闻排行逻辑
    news_list = []
    try:
        news_list = News.query.order_by(News.clicks.desc()).limit(constants.OTHER_NEWS_PAGE_MAX_COUNT)
    except Exception as e:
        current_app.logger.error(e)

    # 定义一个空的字典列表,里面装的是字典
    click_news_list = []
    for news in news_list:
        click_news_list.append(news.to_basic_dict())

    # 查询分类数据
    try:
        categories = Category.query.all()
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="分类查询失败")

    # 将分类对象列表,转成字典列表
    category_list = []
    for category in categories:
        category_list.append(category.to_dict())


    data = {
        # 判断user如果有值,返回左边内容,否则返回右边的值
        # "user_info":user.to_dict() if user else "",
        "user_info": g.user.to_dict() if g.user else "",
        "click_news_list": click_news_list,
        "categories": category_list
    }

    return render_template('news/index.html',data=data)

#浏览器在访问,在访问每个网站的时候,都会发送一个Get请求,向/favicon.ico地址获取logo
#app中提供了方法send_static_file,会自动寻找static静态文件下面的资源
@index_blu.route('/favicon.ico')
def get_web_logo():

    return current_app.send_static_file('news/favicon.ico')